(19)

(11)

EP 3 520 356 A1

(12)

(43) Date of publication: 07.08.2019 Bulletin 2019/32 (21) Application number: 17783649.1 (22) Date of filing: 27.09.2017

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/US2017/053618 (87) International publication number: WO 2018/064114 (05.04.2018 Gazette 2018/14)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (30) Priority: 30.09.2016 US 201662402226 P 26.09.2017 US 201715715432 (71) Applicant: Entrust, Inc. Dallas, TX 75240 (US)	(72) Inventor: MOSES, Timothy, Edward Dallas TX 75240 (US) (74) Representative: Stratagem IPM Limited  Meridian Court Comberton Road Toft, Cambridge CB23 2RY Toft, Cambridge CB23 2RY (GB)